Title
Refining of rice bran oil (Oryza sativa L.) to preserve γ-orizanol
Other title
[Refino de óleo de farelo de arroz (Oryza sativa L.) em condições brandas para preservação do γ-orizanol]
Date Issued
01 August 2007
Access level
open access
Resource Type
journal article
Author(s)
Universidade Estadual de Campinas - UNICAMP
Publisher(s)
Sociedade Brasileira de Ciencia e Tecnologia de Alimentos, SBCTA
Abstract
γ-orizanol is an antioxidant present in rice bran oil, but absent in other vegetable oils, which were attributed to antioxidant and hypocholesterolemic effects. The content of -orizanol in crude rice bran oil varies between 1-2%, but during neutralization in chemical refining this substance is transferred to soapstock. The aim of this research is to study an alternative technique of physical refining in light conditions with the purpose of preserving -orizanol. Inativacted and extrused rice bran obtained by the production of parboilizated rice was used to extract crude rice bran oil (Oryza sativa) by the expeller method. The process of refining consisted of: acid degumming (with 85% H3PO4), centrifugation, clarification, deodorization, and winterization. Chemical analyses were carried out by the characterization of refined oil according to the AOCS methods. Results showed that the physical refining process was able to preserve 97% of orizanol, and its presence improved the oxidative stability of the oil comparing with the commercial rice bran oil (by 33% 13.3 hours to 110°C).
Start page
45
End page
53
Volume
27
Issue
SUPPL.1
Language
(Other)
OCDE Knowledge area
Alimentos y bebidas
Biotecnología agrícola, Biotecnología alimentaria
Subjects
Scopus EID
2-s2.0-51949084862
Source
Ciencia e Tecnologia de Alimentos
ISSN of the container
01012061
Sources of information:
Directorio de Producción Científica
Scopus